Active delay device in streaming media transmission system based on universal series bus

Abstract

An active delay device in a streaming media transmission system based on a universal series bus is provided and comprises a transmission delay determining unit, an actuating delay determining unit, an intrinsic delay determining unit, an intrinsic delay, a comparator, an active delaying arrangement unit, an active delay value, wherein the intrinsic delay is used for calculating each terminal device according to the transmission delay and the actuating delay, and the active delay value is used for determining each terminal device according to a maximum intrinsic delay value and the intrinsic delay of each terminal device. The terminal devices which need to perform control commands in the same frequency can accurately be synchronized, or each terminal device can perform each action according to strict time intervals, particularly in a sound mixing system, the fact that each terminal device strictly performs displaying of sound mixing signals at the same time is effectively ensured, and echo is prevented from being generated.

Description

technical field [0001] The invention relates to a system for real-time data transmission using a serial bus. In particular, it involves precise synchronous control of data processing performed by all devices on the serial bus on the basis of comprehensive consideration of transmission delay for various occasions such as multimedia on-site conferences and industrial control. Background technique [0002] The applicant of this application proposed a Chinese invention patent application with an application date of 2009 / 04 / 24, an application number of 200910135666.7, and an invention title of "A Digital Voice Transmission System Based on a Local Area Network". The continuous and real-time LAN-based voice digital transmission system provides high-quality digital voice transmission. The system includes multiple terminal devices 202-1, 202-2, ..., 202-n and a central control device 201, characterized in that: the multiple terminal devices 202-1, 202-2, ..., 202- n are connected i...

AI Technical Summary

Problems solved by technology

However, in this new serial streaming media bus structure, there is a problem that different terminal devices cannot effectively synchronize when executing commands, that is, a certain action cannot be executed at the same time strictly according to the command of the central control device, or they cannot be executed separately. End devices are able to perform their actions at strict time intervals

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